Camera for color photography



Mardi 27, 1945 A. w. ToNDREAu' 2,372,405

CAMERA FOR COLOR PHOTOGRAPHY FiledFeb. 17, 1943 6 Sheets-Sheet l lvvs/vro. 4435er W Ymen-14u,

Afro/2 5% Mmh27,1945. A, WT'ONDREAU 2,372,405

CAMERA FOR COLOR PHOTOGRAPHY Filed Feb. 17, 1945 6 Sheets-Sheet 2 150 14.9152 150 9 Arroz Ex March 27, 1945. A. w, TONDREAU 2,372,405

v CAMERA FOR COLOR PHOTOGRAPHY Fi'led Feb. 17, 1943 6 Sheets-Sheet 3 161 I3@ 35 34 V 179e i 4. j 81a I 178 7 .I 130177 l 0 \,6 M

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41.5527- WNDREAI/ Marcllz?, 1.945. Y A. w TQNDREAU 2,372,405

CAMERA FOR COLOR PHOTOGRAPHY Filed Feb. 17, 1943 6 Sheets-Sheet 4 flo 20 ATTORNEY.

March 27, 1945. A. w. TONDREAU 2,372,405

' CAMERA FOR COLOR PHOTOGRAPHY Filed Feb. 17, 1943 6 sheets-sheet e ALBEET W. A/oesmf,

INVENTOR.

BY ATTOR EY.

as described and claimed in Vplication, S. N. 440,797, tiled April 28, 1942, by 'Byron C. Haskin for Color Planted Mu. 21,1945

causas Foa coLon PHOTOGRAPHY alben w. rendre, Hollywood, Calif., assignerto Warner Bros. Pictures, Ine., New York. N. Y., a corporation of'Delaware t Application reti-nary 17, 194s, sensi No. 416,179

' v claims. (o1. sa-lai) The present invention relates to a camera for color photography. and while with slight modi.- ncations a camera of this invention may be em'- ployed for a subtractive process, it is particularly adapted to an additive process, particularly the co-Dending apphotography.

'I'he aforesaid tio-pending application relates to a three-color additive process involving the use of only two color separation negatives which may be employed to produce positive prints having a transparent image of the object in natural colors.

An object of the present invention is to provide an improved camera useful for s. three-color process involving the use o1' only two negatives.

Another object oi the invention is to facilitate assembling, adjusting and repairing the working parts of the camera. To this end, the invention provides film handling means and driving means therefor, removable as a unitirom thel casing of the camera.

Another object of the invention is to provide one mount for the nlm independent molmt for the shutter and lens assembly.

For further details of the invention reference may be made to the drawings wherein:

Fig. 1 is a vertical sectional view of the camera showing-certain of the parts in elevation.

Fig. 2 isan end view of the shutter illustrating its flange in section.

Fig. 3 is an enlarged transverse sectional view taken on line 8-3 of Fig. 1.

Fig. 4 is a detailed sectional view of the telescoping drive -connection between the shiftable camera and the power supply.

Fig. 5 is an enlarged transverse view taken on line 5-l of F18. 1.

Fig. 6 is an enlarged fragmentary detailed sectional view of the nlm movement means, the optical system and their associated parts.

Fig. 7 is an enlarged detailed sectional view taken on line 'F71 of Fig. 6.

Pig. 8 is a detailed l-l of Pig. 6.

Fig. 9 is an enlarged detailed sectional view masculines-sorriso.

Fig. 10 is a diagrammatic view illustrating the drive means in full lines and the camera outline in dot and dash lines, looking in the direction indicated byline II-llonl'ig. 3.

Fig. 11 is an enlarged sectional view of Orthochromatic film and Fig. 12 isfan enlarged sec,- tional view ot the Panchromsdc film.

sectional view taken on line handling means, and an Y Pig. 13 is a front view in elevation of the camera but with a modified door having a bulge to accommodate the film loop.

Referring in detail tothedrawings, particularly Figs. 1, 5 and 6. the camera comprises ahousing I for housing the means for traversing two films Il and 2l through the housing I and across the exposure apertures Il and "a served by the objective lens L.

The housing I is a box-like shell divided into two compartments I and I by a midrib t. The compartment 4 houses the ilm handling means generally indicated at! andincluding the feed 'sprockets I3 'and Il, common sprocket Il, nlm' movements 5B and Staand take-up sprockets 99 and III. 'I'he compartment l houses the drive means generally indicated at I, for the aforesaid sprockets and film movements. Two doors I and Lclosethe opposite sides of the housing I and provide access to the compartments l and l respectively. The door 'I is hinged at I' and covers substantially the entire one side of the housing I. The peripheral vedge of the door 'I conforms to the contour of the housing I and is provided with cooperating stepped shoulders I to maintain a light seal therewith. 'I'he door l covers substantially the' Jentire other side of the housing I, except for the well I Il (Fig. 5) and is secured theretoby suitable screws Il.

The midrib l is a plate-like member arranged verticallyinthehousing I inaplaneparallelto the main optical axis A of the camera and offset relative thereto. The midrib l is secured to an inwardly` projecting flange II formed integral with the wallsoi the housing I (see Figs. 1, 3 and 5). The midrib l is removably secured to the flange Il by suitable screws I2 spaced around its periphery. The midrib l carries or supports the film handling means 2 yon one side thereof, and the drive means 8 for the-same on its other side, and is readily secured to and removable from the housing as a unit through opening door 1, for ease in assembling. adjusting and-repairing the working parts of the camera. This is an important feature of my invention.

The film handling means 2 includes a pair 'of continuously driven feed sprockets Il and I l (see Fig. 5) secured side by side to a common shaft ;by a cam latch 31,

ably a Panchromatic' film substantially' equally sensitive to all colors while the lm t] is an Orthochromatic film, more sensitive to blue than other colors. The magazine viii containing the films i5 and 2t is mounted on top of the housing I adjacent its rear edge. The magazine I8 has an eccentrically located mounting boss 2l (Figs. l and 5) on its under side which cooperates with a, raised seat 22 on the upper wall of the housing I. The lm supply'magazin'ev I@ is removably secured to the housing by 3a iiange 23 which extends around the seat 22 and closely re ceives the boss 2i, a rib 25 on the forward lower edge of the boss 2l cooperating with a groove 25 in the forward wall portion of the ange 23. A

clamp screw 25 threaded through a downwardly and forwardly inclined opening in the rear portion or the fiange 23 engages in a notch 2l in the rear side of boss 2i, to removably secure the magazine to the housing i.

Thelms i9 and Zi@ coming from the magazine Iii are kept taut by a conventional friction brake' Zl projecting from midrib t. The films i9 and '2G are then trained around the feed sprockets i3 and I5. Suitable retractable rollers 35 and 35 on arm retain thev films I9 and 25 in engagement with the sprockets i3 and I5 and the rollers 34 and 35 are held in engagement with the films The films i9 and .25 upon leavingthe sprockets i3 and Iii move forwardly asvacce ing plate '5t by screws 55 passing through a ange 55 formed on the back inner edge of the -plate di. Screws 55 are threaded into the movement mounting plate 55.

As indicated in Figs. ll and 12, the Orthochromatic film 2@ has an emulsion X which is highly sensitive to blue for recording ablue sensation record when exposed at the aperture i9 and also has a red dye Y over the emulsion X which acts as a red filterv for the fbi-pack, thus recording. a red sensation record simultaneously on the Panchromatic" nlm I9, The TPanchromatic nlm I5 has an emulsion Z that is sensitive to all colors. 'l l The -lms I9, E@ in bi-pack relation are intermittently advanced through the slot l5 to expose certain areas thereof at the aperture 439. it is preferred to advance the films I5, 2li as a bi-lpack, a distance of two picture frame areas at a time leaving every other picture frame area unexposed for a purpose to be later described. A

l provide an improved lm movement means 5G for advancing the lms I9 and 2li as a bi-pack. As shown particularly in Fig. 6, the r,film move ment 55 comprises lm engaging claws or pins 5l formed on the outer end of an arm 58. rhe

lin the housing I. The film i9, the outermost film is given a back loop 38 (see Fig. 1) to side step the film I9 to bring lm I9 into the same plane as the lm 29 and they are then trained over a common continuously driven sprocket ill with the emulsion of film I9 in contact with the emulsion of the film 20. The films I9 and 29 are retained on sprocket 40 by suitable retractable rollers 4I.v v

The sprocket 40 is secured to a shaft 42 rotatably carried by a pair of anti-friction bearings 43 (see Fig. 3) mounted in a boss 44 on the midrib 6. The shaft 42 projects through the midrib 6 and into the compartment 5 to be rotated by the drive means 3 to be later described.

The films I9, 29 leaving the common sprocket 40 in face to face relation, form a bi-pack and Y, are trained down through a guideway slot 45 formed between aperture plate 46 and the back plate 41. The upper portion of the slot 45 is curved while the lower portion is straight and normal to the main axis A of the optical system. The aperture plate 45 forms-a part of thev front wall of the housing I and its front side is flush therewith and its aperture 49 occurs at the straight portion of the slot in line with the main axis A of the optical system.

The aperture plate 45'is secured to a movement mounting plate 50 by screws 5I and 52, and the plate 50 in turn is secured to the midrib 5 by screws 53. The front line of the plate 50 as it Aappears in Fig. 6 is the same as the front line of aperture plates 46 and 46a, both of which'are the front line or surface of the front wall 2l I. The back plate 41 is arranged closely adjacent 'to the p1ate`46, allowing just enough space for the thickness of films I9 and 20 with a suitable clearance. The back plate 41 issecured to the mountthe back plate 41,

ring 66 and is slidably received in an opening 'I2 arm Eil-is a double ended lever pivoted intermediate its ends on a crank pin formed eccentrically on a shaft 5t. As shown in Fig. 7, the

shaft 5@ is rotatably mounted in a bearing block 55a secured to the movement mounting plate 50 by screws 59h, The shaft @Il is continuously rotated-by the drive means 3 as will be later described. y

The crank pin 59 works in an elongated slot 5I in the arm 58 and is provided with a hardened wear taking block 52. A. retaining washer 63 is attached to the end of the pin 53 by a screw 54 -to hold the block 52 and the arm 58 againstdisplacementvfrom the shaft 50. The inner end of the arm 58 is pivotally connected at 65 to an oscillating ring 55. The'ring 66 surrounds an eccentric 5l formed on the shaftl 69. The axis of the eccentric 6l is diametrically opposite' the axisof the crank pin 59 to give the desired motion to' the arm 58. The ring 66 has an anchor 58 diametrically opposite its pivotal connection ,55 with the arm '58. '-Ihe anchor 68 prevents roftation of the ring 66 and gives it an oscillating motion. The anchor 68 comprises a block 69 pivoted ona pin 'I0 in the mounting flange 55 of A rod .'II projects from the in-the block 59. The anchor 68 thus provides a rocking slide bearing for rod 1I:

As the shaft rotates, the crank pin 59 in being diametrically opposite the eccentric 61, gives the arm 58 a smoother action with much less sawing of its pins 51 in the perforations of the lm. The crank pin 59 with the aid ,of the oscillating ring 66 gives the arm 58 the desired swing motion while the oscillating ring 66 alone produces the reciprocation of the arm 58 and the reciprocation of the arm occurs while the crank pin 59 is dwelling, thus allowing the pins 51 to inove into and out of the film perforations while the lm remains still.

Suitable pilot pins I3 are employed in conjunction with the movement mea-ns 56 to hold the lm in register with the aperture 49 while the exposure is taking place and the arm 58 is being retracted and returned to the successive lm engaging position ready to advance the next portion of lm. The pilot pins 'I3 are guided for reciprocation inopenings 14 in-a. boss l5 projectasvaeos w ing from the mounting iiange Il of the back plate 41. The pins 1I engage in perforations at op' posite sides of the films I9, 24 and their inner ends are connected by a plate 19; vThe plate 10 is connected to a push rod 11`which is slidably received in an opening 10 in a bearing block 19 attached to the movement mounting plate Il. The push rod 11 has a cam notch 00 formed in a thickened portion (see Figs. 6 and 8) and a cam 02 operating in the notch 00 reciprocates the rod11anditspins1l. n

The cam l2 is'formed on the end of a shaft 03 which is mounted for oscillation in a sleeve bearing I4. The shaft 03 is eccentrically located in the sleeve I4 for purpose to be later described. 'I'he sleeve bearing 04 is carried in a tubular boss 05 secured to the movement mounting plate 50 by screws 00. A suitable connection 01 is provided between the shaft 60 and the shaft 83. The connection 01 is located behind the midrib 9 in the compartment 5. connecting rod 99 plvotally connected at its upper end as shown in Fig; 'I to a crank pin 99 secured .to the inner end of shaft 00,' connecting rod 90 being pivotally connected at its lower erld as shown at the top of Fig. 8 to a crank pin 99 secured to the shaft 03. The radius of eccentricity of crank pin 09 is greater than that of crank pin 09 as indicated in Fig. 6. Rotation of shaft 60 causes reclprocation of connecting rod 90 to 'oscillate shaft 0I and cam 02, to reciprocate the pilot pins 19. The operation of timed that they remain in engagement with the perforations in the films from the time the feeding pins 51 start to leavev the perforations until 'they again are engaged'in the perforations.

The Orthochromatic iilm upon leaving the aperture 49 is directed towards the rear of the housing I-while the Panchromatic" film I9 is given a back look 9| to sidestep the rearwardly moving nlm 20 and is given another back loop 92 to bring it back into line againon the other side of the illm 2l (see Fig. 6 'I'he Panchromatic iilm I9 continues forward, with its emulsion side up, to traverse a second aperture 49a where the unexposed areas are successively subjected to a reilected beam of light. y A prism P is provided in the optical system to split the light into a direct beam and a renected beam. Prism P is arranged between the lens L of the optical system and the apertures 49, 49a, as will later more fully be described. The reflected light is passed through a plus green tllter 95 carried by the aperture plate 404, to make a green sensation record on the nlm I9 between the alternate red records already on it. The aperture plate 46a is similar to aperture plate 49, but reversed in position and at right angles thereto. The nlm I9 is trained through a guide slot 49a between the aperture plate a and a back plate 41a similar to plate 41. The axis of' the diverted beam of vlight is substantially normal to the main'axis A oi the optical system.

, The film I9 is intermittently advanced through the guide slot a in synchronism with the advanpcement of nlm "bi-pack I9, 2l through guide slot 45. Filmmovement means 59a similar vto the above described means I0, advances the film I9 and includes claws 01a on arm 90a for engaging'the film I 9. Arm 90a slidably receives crank pin 59a and is pivotally connected at 03a to oscir- `lating ring 00a. The ring a is mounted on eccentric 91a formed on shaft 00a which also carries crank pin lla and is anchored at 00a.

` The operation of the nlm movement means a Y Connection 01 comprises a the pilot pins 13 is so' is substantially the same as the movement means 56 described above- The claw 51- works in a notch n' in the back plate 41 and in a notch 46' in the front plate 40.

` the films-I9 .across the aperture 49a. The claws 01 and 01a move the `iilms I9 and 2l two picture frames at a time, with the result-that iilrn 20 has. only alternate drame areas exposed, while film I9 has all picture frame areas exposed, the exposure of film I9 at aperture 49 being in the even numbered frames and at aperture 49a in the odd,

numbered frames or vice versa.

Pilot pins `13a. and their associated operating Parts for the movement meansv 56a are identical with the aforedescribed pilot pins 13 for the movement means 09 so the same numeral will appear on the drawings' Upon leaving the guide slot 45a, suitable guides 96 and 91 direct the film I9 in a U shaped path back. towards Vthe rearwardly moving film 20.

The two iilrns I9 and 29 are brought together and trained in superposed relation across the underside of the common sprocket 40 and held in cooperation therewith by retractable rollers 98. The films I9 and 29 then move downwardly and rearwardly to laterally spaced take-up sprockets 99 and |00 and held therewith by retractable rollers 99a and Illia (see Figs. 1 and 5). The film I9 after leaving the common sprocket 40 is given a back loop |0| to sidestep the nlm 20 and bring film .I9 into. line with its sprocket 99. The sprockets 99 and I 00 are fixed on shaft |02 mounted for rotation by spaced antifriction bearings |03 in a boss I 04 on midrib 0. The shaft |02 projects into the compartment 5 to be driven by the drive means 9 to be later described.

'Ihe iilms I9 and 20 upon leaving thetake-up sprockets 99, |00 pass over guide rollers |05 (Fig. 1) out through opening |05 in the rear wall of the housing-I to be wound up in the take-up magazine |41 on reels |91a. The drive for reels |01a will be later described. 'I'he construction of the magazine I l1 and its means of attachment is identical with that of the supply magazine I0 described solas to be interchangeable therewith.

A shutter H0 is mounted in ahousing for rotation on a shaft I |01: between the apertures 49, 49a and prism P. The housing I i I is mounted stationary relatively to the main camera housing and the camera base |20, as will be subsequently described. The shutter |I0 is a disc-like body with an arcuate slot H2 (Fig. 6) which extends substantially and registers with the aperture 49. An axially extending ange I I9 projects fbrwardly from and atright angles to the body |I0 and passes between the prism P and the aperture 49a and has a slot`| I4 which registers with the aperture 49a. 'I'he slot ||4 is of same extent as the ,slot III and registers with the aperture 49a in synchronism with the slot I|2 registering with its-aperture 49. The housing I|| has an opening IIIa which registers with aperture 49 and an aperture IIlb which registers with aperture 49a. The housing I Ilhas its back wail close The prism P is mounted in a suitable holder H6 secured in an opening ||1 in the cover plate H5 and the lens holder ||8 is threaded into a tubular boss ie on the front of the cover M6.

The camera housing is mounted on a base |26 (Figs. l and 10) and is provided with guideways |2| and |22 at its front and rear edges respectively to allow for transverse movement of the camera with respect to the base |20. lThe shifting of the camera moves the axis of the view finder |23 into optical alignment with the main axis of the optical system. The view finder |23 is mounted on the door 'E (see Fig 3) and includes a lens tube |255 having the usual ground glass and a prism located at the inner end of the view finder |23 in register with its window |25. The window |25 of the View nder is brought into register with the opening |||a in the shutter housing ME upon shifting of the camera, so that Y the operator can look through the optics of the camera to see the exact areas exposed to the apertures ftd and a.

spaced racks 26 and |21 are attached to the underside of the housing adjacent the front'and rear guideways ii and |22 (see Fig. l). Gears t28 and |23 engage the racks |26 and |21, re-

spectively, and are fixed on a common shaft |8|| journaled in the base |20. The shaft |30 projects from the rear end of the base |20 and a manual operating handle |3| is fixed thereto. Suitable positioning means (not shown) may be provided to locate the camera in its two positions.

The base |20 is provided with a threaded boss |32 exposed at its underside for. receiving the hold-down screw of the usualA tripod mount (not shown), while the major portion of its lower side is covered by a plate |33.

The drive means 3f for the camera diagram-A I matically illustrated ln Fig. 10, comprises a motor M clamped in a cradle |35 by a band |36 secured to cradle |35 by screws 2|3. Cradle |35 is mounted on a shelf |31 of the base |20 (see Fig. 3). The motor shaft |38 is connected with a shaft v |39 ythrough a suitable friction clutch indicated at |40. The outer end of shaft |39 is journaled in a bearing 2|4 fixed in the lower end of a. bracket |4|.v Bracket |4| supports the shutter housing and it may be formed integral with the cradle |35 (see Figs. 3 and 4). The shaft |39 has a. spiral gear V|42 incased in the lower end of the bracket Ill. The drive for the shutter ||0 includes a shaft |43 housed in a tubular bearing tube |44 formed on the back side of the bracket |4|. Shaft |43 has a spiral gear |45 at its lower end which meshes with the gear |42, and a spiral gear |48 at its upper end which meshes with a mating gear |41 on the shutter shaft ||0a.

The drive between the motor M and the drive means 3 in the housing comprises a. telescopic connection |48 (see Fig. 4) lwhich permits the lateral Shifting ofthe camera for view ndi'ng. The telescopic connection |48 comprises a shaft |49'mounted for rotation on spacedV antifriction The meshes with a mating gear |53 fixed on a shaft |66. The shaft |66 is carried by spaced bearings |6| on the midrib 6 and is disposed at a 45 angle, being pitched upwardly and rearwardly adjacent the side of the midrib 6. The driven shaft |66 drives thetwo film movements et and 58a. A spiral gear |62 fixed on the lower end of the shaft |66 meshes with a mating gear |63' on the shaft 66a of the nlm movement means 56a and a similar gear located above gear |58 meshes with a gear |35 on the shaft 60 of the nlm movement means 56.

The driven shaft |68 drives a second angularly disposed shaft |66v arranged at right angles to the shaft |60 but in a laterally spaced plane relative thereto. TheA slfaft |66 is pitched downwardly and rearwardly and `is driven by a pair of spiral gears |61 and |68 fixed to the upper ends of the shafts |60 and |56 respectively. The shaft |66 is connected to the Ashaft l2 of the common sprocket 60, to drive the same, by a pair of spiral gears |69 and |18 fixed on the shafts |66 'and d2, respectively. The lower take-up sprockets 33, |00 are also driven by the shaft |66, anda pair of spiral gears |1| and |12 fixed to the ends of the shaft |66 and the shaft |02, respectively, connect the take-up sprockets 99, ||l0 for rotation. I

A third angularly disposed shaft |13 is driven by the shaft |86. The shaft |13 is arranged in the same vertical plane as the shaft |60 and parallel therewith to have its axis normal to the axis of the shaft |66. .A pair of spiral gears |14 and l |15 are xed to the shafts |66 and |13, respectively. The shaft |13 is. connected to the shaft |5 of the feed sprockets i3 and I4 by a pair of spiral gears |98 and |99 fixed to the shafts |13 and |5,respectively. l

The shaft |13 forms a part of the drive for the take-up'reels I01a and comprises a spiral gear |16 fixed to the shaft |13 and meshing with a mating gear |11 on a shaft |18. The shaft |18 is rotatably carried by spaced bearings |19, |10a (seeFig. 5) mounted in a boss |80 on tlfe midrib 6. The gearv |11 is arranged on the shaft |18 between the bearings |19, |19a and a pulley |8| is removably secured by screw |8|a tothe outer end of. the shaft |18 which projects through the side wall of housing A depression |83 formed in the side of the housing adjacent its rear edge Yreceives the pulley |8I and the door 8 is notched atA |84 to leave the pulley uncovered and readily accessible. A similar pulley |85 is connected to the shaft of the take-up reels |01a and a suitable belt |85 connects the two pulleys |8| and |85for rotation.

The usual friction drive (not shown) is pro- Y vided in the shaft for the take-up reels |01a so' as to properly take-up the films I9 and 20 regardless of the peripheral speeds required. The friction drive in the take-up magazine |01 becomes the friction brake in tbe supply magazine I8 when used for the same, and vice versa;V as is common practice.

Counters |81 and I 88 'are provided to register the amount of film wound up on the reels |01a and also the amount used for each scene and are mounted on the hack wall of the housing A by a common shaft 19|.

pair of miter `gears |99. and |99V at each counter I81 and |88, respectively, are connected together gear |91 on the end of the shaft |5 of the feed sprockets I3, |4 adjacent the gear |99 (see Fig. 5). Referring to Fig. 6 it will be seen that the lL shaped aperture plates 49 and 45a merge lwith and iit in thev angular front wall 2li of the camera alongside of the movement mounting plate 59. The aperture plates 49 and 49a have a light seal t with wall 2|I by means o1' cooperating stepped shoulders 2|2 and 2I3. 'Ihe shoulders or light seals 2I2 and 2I3 extend straight out at right angles to the plane of Fig. 6 until they meet door 1, as shown in Fig. 3, and the ends of these shoulders 2I2 and 2I3 are lightl sealed by the inside of door 1. This is also shown in Fig. 13 where the outer ends of shoulders 2I2 and 2|3 are light sealed by door 2|5. The door 2I5 may have a bulge 2I6 to provide more space for loop 9|, 92.

By opening door 1 and removing screws I2 which hold the plate -9 to the flange II, and by removing screw I8Ia and pulley I8I, plate 9, with the iilm handling means 2 (including movement mounting plate 59 and aperture plates 49 and 49a), and with the film driving means 3 mounted thereon, may be removed as a unit through the opening of'door 1, the telescopic connection |48 permitting shaft |53 to be removed from socket |52. Hence the film handling-means 2 and the film drive 3 which form a unit with the plate 5, may be readily removed for inspection, adjust-l ment, and repair.

The withdrawal of the pilot pins 1,3, 13a for threading the films I9 and 29 through. the film movement means 59 and 59a is accomplished in a like manner and the' description of threading ,the lms I9, 29 through means 59 is as follows.

i sults in bodily sluiting ot the shaft 93 and the retraction of the pilotpins 13, by the cooperation of the cam 92 in cam slot 99 of pushrod 11 which in turn is connected with the pilot pins 13. The sleeve 84 has an operating arm y299 which is ac cessible in compartment 4 o! the housing I. arm 299 lies adjacent the movementA mounting;l plate 59 and has a releasable latch 29| (Fig. 9)

for holding the arm in either its normal position or its retracted position. The latch 29| comprises a retractable plunger 292 which is guided for movement in a tubular sleeve 293 attached to the outer-end of the arm 299. The plunger 292 has an enlargement 294 slidably received in a socket 295 in the sleeve 293. -The enlargement 294 is located on the plunger a' slight distance from its inner end to leave a nose 299 which is selectively engaged in one of its two spaced locating openings 291 in the plate 99. A spring 299 surrounds the plunger 292 and is arranged between the bottom of the socket 299 and the enlargement 294 to releasably hold the arm 299 in its set position. The latch 29| may include an arcuate guide 299 for the end of the arm which relieves the arm of any outward thrusts.

The pull-down means 59a being in the same timed relation with pull-down 59 will also have its feed pins 51a retracted, and to retract its pilot pins 13a, one merely swings the arm 299a around after releasing latch 29|a. The iilm may then be readily threaded through the pull-downs 59 and 59a after which the arms 299 and 299a may be returned to their normal position and latched.

After the films I9 and 29 have been exposed in I the camera above described, they may be suitably developed, and then release prints may be prepared in any suitable manner. Some methods of preparing release prints are disclosed in the co-pending application S. N. 440,797, tiled April 28, 1942, by Byron C. Haskin for color photography, which application also discloses and claims the generic aspects of the method and means for color photography disclosed in the present application.,` This case is a continuation- I ill-part of S. Iii-440,796, filed April l28, 1942, for

Camera for color photography. The lm registering mechanism disclosed herein is claimed in my co-pending application S. N. 476,181 tiled February 1'1, l1943. The film movement mechanism disclosed herein is claimed in my copending application S. N. 476,180, tiled February 17, 1943.

Various modifications may be made in the invention without departing from the spirit of the following claims.

I claim:

1. A camera comprising a housing, a plate in said housing, means removably securing said plate in said housing, a film gate secured to said plate, said housing having a front wall with an aperture therein, said gate nttng saidl aperture, a pull-down mechanism mounted on said plate, and a drive sprocket mounted on said plate, said housing having a dooropening through which said plate is removable.

2. A camera comprising a housing having a front wall with a gate aperture therein, a plate extending at right angles to said wall, a gate secured to the front of said wall and extending at right angles thereto, and means removably securing said plate i'n said housing fitting said aperture.

3. A camera according to claim 2, comprising nlm traversing means mounted on said plate on the same side thereof as said gate, and driving means for said traversing means on the opposite side of said plate and mounted thereon.

4. A camera comprising e. housing having an angular iront wall with an aperture therein, a plate removably secured in said housing and having'a movement mounting plate removably secured -thereon, two aperture plates arranged at right angles and removably secured on said mounting plate, said aperture plates fitting said aperture in said .front wall and having a light seal fit therewith, and a door for said housing through which said plate, said movement mount- 4ing plate and said aperture plates-,are removable said aperture in said front wall, said housing.

having a door through which said plate and said with said este aperture plete meme me iemoveble es e unit, seid. .'iooipoviding e, light Seel los one side o seid epeitui'e plete means. v

6. A camere oompisimg e, housing having e from vvell with en eper'ure therein, e plece removably seemed iii seid housing, ilm travers img mechanism ou seid plete, en aperture plete om seid ist plete, seid epeiicuie plete iemoveoly fitting said from; well epesiuxe, e motor: ouiside of seid housing, e, shut/ei om seid housing in from of seid eperture plete, s, coupling between seid motor and seid shutter, ein inelepemdem; slideiolv deveclieole coupling between seid motor eind, seid lm tieversing mechanism, emi e door ou seid housing through whim seid rs plete., seid aperture plete and seid ulm irevessing mechanism ere removable e, uiiis.

7. l camere comprising e, housing hevig eu l enemies from well with en spel-ture thesein; e

ALBERT W. TNDR'MU. 

